target/riscv: Convert RVXI fence insns to decodetree

Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Peer Adelt <peer.adelt@hni.uni-paderborn.de>

diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 1f5bf1f6f97d63c4c989ecf6f7817a196fbb46b5..804b721ca51e9c570f405f7213bddbf32823f1a3 100644 (file)
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -82,3 +82,5 @@ srl      0000000 .....    ..... 101 ..... 0110011 @r
 sra      0100000 .....    ..... 101 ..... 0110011 @r
 or       0000000 .....    ..... 110 ..... 0110011 @r
 and      0000000 .....    ..... 111 ..... 0110011 @r
+fence    ---- pred:4 succ:4 ----- 000 ----- 0001111
+fence_i  ---- ----   ----   ----- 001 ----- 0001111

diff --git a/target/riscv/insn_trans/trans_rvi.inc.c b/target/riscv/insn_trans/trans_rvi.inc.c
index 136fa54d06559aebcce8944ea782194f611211fc..973d6371df85064c90580b554038df60132b8efc 100644 (file)
--- a/target/riscv/insn_trans/trans_rvi.inc.c
+++ b/target/riscv/insn_trans/trans_rvi.inc.c
@@ -318,3 +318,22 @@ static bool trans_sraw(DisasContext *ctx, arg_sraw *a)
     return true;
 }
 #endif
+
+static bool trans_fence(DisasContext *ctx, arg_fence *a)
+{
+    /* FENCE is a full memory barrier. */
+    tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
+    return true;
+}
+
+static bool trans_fence_i(DisasContext *ctx, arg_fence_i *a)
+{
+    /*
+     * FENCE_I is a no-op in QEMU,
+     * however we need to end the translation block
+     */
+    tcg_gen_movi_tl(cpu_pc, ctx->pc_succ_insn);
+    tcg_gen_exit_tb(NULL, 0);
+    ctx->base.is_jmp = DISAS_NORETURN;
+    return true;
+}

diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 1ae84dcd5992e2e1320cb4c13037974ef211c007..f720746cb791dbef2885e33c0a3cb5d08aaca65d 100644 (file)
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -1950,18 +1950,6 @@ static void decode_RV32_64G(DisasContext *ctx)
         gen_fp_arith(ctx, MASK_OP_FP_ARITH(ctx->opcode), rd, rs1, rs2,
                      GET_RM(ctx->opcode));
         break;
-    case OPC_RISC_FENCE:
-        if (ctx->opcode & 0x1000) {
-            /* FENCE_I is a no-op in QEMU,
-             * however we need to end the translation block */
-            tcg_gen_movi_tl(cpu_pc, ctx->pc_succ_insn);
-            tcg_gen_exit_tb(NULL, 0);
-            ctx->base.is_jmp = DISAS_NORETURN;
-        } else {
-            /* FENCE is a full memory barrier. */
-            tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
-        }
-        break;
     case OPC_RISC_SYSTEM:
         gen_system(ctx, MASK_OP_SYSTEM(ctx->opcode), rd, rs1,
                    (ctx->opcode & 0xFFF00000) >> 20);